Question

How are temperature on Celsius and Kelvin scales related?

Answer 1

Hint: Celsius scale is also known as the centigrade scale when the freezing point of water is at ${0^o}C$ and the boiling point of water is at ${100^o}C$. Thus, the difference between boiling and freezing points is ${100^o}C$. In the Kelvin scale as well, the magnitude of difference in temperature of boiling and freezing points is $100$.

Complete step by step answer:
We know that there are three temperature scales in use to date. They are:
a. Celsius Scale
b. Fahrenheit Scale and kelvin scale
c. Kelvin Scale
Celsius temperature scale can be defined as the temperature has two fixed points, one of the fixed points is known as Ice points, and at this point, water solidifies itself to form ice. This occurs at ${0^o}C$ and the other point is known as a steam point, this is the point where water evaporates to form steam. This happens at the temperature of ${100^o}C$.

Kelvin temperature scale on the other hand is defined as the fraction of $\dfrac{1}{{273.16}}$ of the thermodynamic temperature of the triple point of water.
We know that the triple point of water is defined as that particular temperature at which water can exist in all three states that is solid, liquid and gaseous.
In the Celsius scale, the triple point of water is at ${0.01^o}C$ and in the Kelvin scale, it is at exactly $273.16K$.

We can convert a given temperature from Celsius to Kelvin scale by adding $273.16$ to the temperature at the Celsius scale.
${T_C} + 273.16 = {T_K}$
Where,
${T_C}$ is the temperature at Celsius scale
${T_K}$ is the temperature at Kelvin scale
Similarly, to convert temperature from Kelvin to Celsius scale, we subtract $273.16$ from Kelvin scale.
${T_C} = {T_K} - 273.16$

Note: Kelvin temperature scale or Kelvin $(K)$ is regarded as the SI Unit of temperature. This is because it has its absolute zero temperature at $0K$, unlike any other temperature scale. Absolute zero temperature is defined as the coldest temperature. This is the temperature where no amount of heat energy exists in the substance.